#include <I2CKeyPad.h>
#include <LiquidCrystal_I2C.h>

#define deltaTime(val) (millis() - val)

I2CKeyPad keyPad(0x21);
char keypad_layout[19] = "123A456B789C*0#DNF"; // N = NO_KEY, F = FAILED

LiquidCrystal_I2C lcd(0x27, 16, 2); // Change 0x27 to the correct I2C address for your LCD

// Just to avoid spamming
unsigned long lastKeyPress = 0;
unsigned long keyDelay = 200;

void setup() {
  Serial.begin(9600);
  
  if (!keyPad.begin()) {
    Serial.print("Cannot connect to I2C keypad.\n");
    while(1);
  }

  keyPad.loadKeyMap(keypad_layout);

  lcd.init();
  lcd.backlight(); // You can remove this line if your LCD doesn't have backlight control
  lcd.setCursor(0, 0);
  lcd.print("Press a key:");

//lcd.setCursor(0, 3);
 // lcd.print("HAVE A NICE DAY:");


  lcd.setCursor(0, 3);
  lcd.print("PROJECT BY ARVIND:");





}

void loop() {
  if (keyPad.isPressed() && deltaTime(lastKeyPress) > keyDelay) {
    lastKeyPress = millis();
    char ch = keyPad.getChar();
    Serial.println("Pressed: " + String(ch));
    
    lcd.setCursor(0, 1);
    lcd.print("Pressed: " + String(ch));
  }

  // Makes the code run faster
  delay(10);
}